<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

</body>

<script>

    let fontSize="100x";
    let i=parseFloat(fontSize);
    i*=2;
    fontSize=i+"px";
    console.log(fontSize);

    let name="徐飞";
    let s=encodeURI(name);
    console.log(s);

    let s1=decodeURI(s);
    console.log(s1);

</script>
</html>